Experimental Study on New Joint Model of Geomembrane and Asphalt Concrete Structure
In order to study the reliability of joint connection between geomembrane and asphalt concrete structure,based on the indoor model test,the reliability of the joint between the geomembrane and the asphalt concrete panel is demonstrated from three aspects:the bond strength between the geomembrane and the asphalt concrete,the adaptability of the joint to deformation,and the impermeability of the joint,and a new joint connection between the geomembrane and the asphalt concrete structure is proposed.The results show that the strength of the bond increases with the decrease of ambient temperature,and the bond strength can reach1.0 MPa at 5℃;the joint de-formation can be absorbed by setting a bulge at the joint section,and the joint between the HDPE film and the asphalt concrete connecting plate can adapt to a displacement of 7.8 cm for settlement,5 cm for opening,and 7.2 cm for shearing.An impermeability test is conduc-ted on the joint after deformation,indicating that the joint can maintain its impermeability performance under a water pressure of 0.45 MPa.The use of SK hand-scraped polyurea to directly bond the geomembrane with asphalt concrete,and the application of reasona-ble construction technology can ensure the reliability and adaptability of the joint connection,which is of positive significance for the pro-motion of geomembrane seepage prevention.
geomembraneasphalt concretepumped storage power stationsjoint
万方数据
维普
